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Is SQL a good language for data transformations?
(discuss.tchncs.de)
Can I suggest duckdb?
You can start out writing SQL directly on top of CSV and Parquet files.
But then if you want/need to do something more complicated, you can import duckdb
into Python, keep running the SQL you already wrote, convert it to a Pandas or Polars dataframe, transform it, then query the result in SQL.
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